/*
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 * and open the template in the editor.
 */

/**
 *
 * @author Administrator
 */
public class CheckPhone {
    public static void main(String[] args) {
        String mobile = "15177128876";
        boolean flag = true;
        if(mobile.length()!=11){
            flag = false;
        }
        if(!(mobile.startsWith("13")||mobile.startsWith("15"))){
        flag = false;
    }
        String numstr = "0123456789";
        for(int i=0;i<mobile.length();i++){
            char c = mobile.charAt(i);
            int temp = numstr.indexOf(c);
            if(temp<0){
                flag = false;
                break;
            }
        }
        if(flag){
            System.out.println("是合法的手机号码");
        }
        else{
            System.out.println("不是合法的手机号码");
        }
    }
    

}
